SN74HC148 8-Line To 3-Line Priority Encoders | TI.com

SN74HC148 (ACTIVE)

8-Line To 3-Line Priority Encoders

8-Line To 3-Line Priority Encoders - SN74HC148
Datasheet
 

Description

The ’HC148 devices feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. These devices encode eight data lines to 3-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and enable output EO) has been provided to allow octal expansion without the need for external circuitry. Data inputs and outputs are active at the low logic level.

Features

  • Wide Operating Voltage Range of 2 V to 6 V
  • Outputs Can Drive Up To 10 LSTTL Loads
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 16 ns
  • ±4-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • Encode Eight Data Lines to 3-Line Binary (Octal)
  • Applications Include:
    • n-Bit Encoding
    • Code Converters and Generators

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Parametrics Compare all products in Encoders & decoders

 
Function
Technology Family
VCC (Min) (V)
VCC (Max) (V)
Channels (#)
Voltage (Nom) (V)
F @ nom voltage (Max) (Mhz)
ICC @ nom voltage (Max) (mA)
tpd @ Nom Voltage (Max) (ns)
Configuration
Type
IOL (Max) (mA)
IOH (Max) (mA)
Rating
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
Bits (#)
Digital input leakage (Max) (uA)
ESD CDM (kV)
ESD HBM (kV)
SN74HC148 SN54HC148
Encoder
Multiplexer    
Encoder/Multiplexer    
HC     HC    
2     2    
6     6    
1     1    
3.3
5    
3.3
5    
28     28    
0.08     0.08    
49     49    
8:3     8:3    
Standard     Standard    
5.2     5.2/-5.2    
-5.2      
Catalog     Military    
-40 to 85     -55 to 125    
PDIP | 16
SOIC | 16
SO | 16    
CDIP | 16
LCCC | 20    
See datasheet (PDIP)
16SO: 80 mm2: 7.8 x 10.2 (SO | 16)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)    
See datasheet (CDIP)
20LCCC: 79 mm2: 8.89 x 8.89 (LCCC | 20)    
8     8    
5     5    
0.75     0.75    
2     2